"Overrated" are those philosophers, who are lectured in the pseudoscience of "politology" because they have written explicitely on politics.
"Underrated" are those philosophers, who are ignored by "politologists" because they have not written explicitely on the political implications of their systems.
Dude, don't you like Nicolás Gómez Dávila? He was many things, but "somebody who didn't write explicitly on politics" was not one of them.
He is not - and hopefully will not be - lectured by "politologists".